Can anyone solve this error regarding c++?

Question

# include <iostream.h>
# include <conio.h>
# include <stdio.h>
struct employee
{
int eno;
char name[20];
float salary;
};

void display (employee e[50],int );
void add(employee e[50],int &);
void del(employee e[50],int &);
void modify (employee e[50],int &);

void main()
{
employee e[50];
int n,x;
cout<<"ENTER LIMIT -";
cin>>n;
for(int i=0;i<n;i++)
{
cout<<"enter employee number";
cin>>e[i].eno;
cout<<"enter the name";
gets(e[i].name);
cout<<"enter salary";
cin>> e[i].salary;
}
while(i)
{ cout<<"main menu";
cout<<"1) display";
void add(employee e[50],int &n)
{
cout<<"enter number";
cin>>e[n].eno;
cout<<"enter name";
gets(e[n].name);
cout<<"enter salary";
cin>>e[n].salary;
n++;
}

void del(employee e[50],int &n)
{
int emp;
cout<<"enter the employee id that you want to delete = ";
cin>>emp;
for(int i=0;i<n;i++)
{
if (e[i].eno==emp)
{
for (int j=i;j<n-1;j++)
e[j]=e[j+1];
break;
}
}
n--;
}

void modify(employee e[50], int &n)
{
int x,sal;
cout<<"2) Add";
cout<<"3) delete";
cout<<"4) modify";
cout<<"5) exit";
cout<<"enter your choice ";
cin>>x;

switch(x)
{
case 1:display (e,n);
break;
case 2: add(e,n);
break;
case 3:del(e,n);
break;
case 4:modify(e,n);
break;
case 5:exit(0);
break;
default:cout<<"INVALID CHOICE";
break;

void display(employee e[50],int n);
{
for(int i=0;i<n;i++)
{
cout<<"Employee code"<<e[i].eno;
cout<<"Employee name"<<e[i].name;
cout<<"Employee salary"<<e[i].salary;
}
cout<<"Enter the eno & new salary";
cin>>x>>sal;
for(int i=0;i<n;i++)
{
if(e[i].eno==x)
{
e[i].salary=sal;
break;
}
}
getch();
}

Answer 1

You are using non-standard C++ so it won't run in SoloLearn playground. conio.h is a Turbo C++ only include. The other two includes need to have the '.h' removed. stdio must become cstdio. The getch() call at the end will not work here as well.